Magnetic alloy particle compositions and method of manufacture
Abstract
Abstract THIS INVENTION RELATES TO THE PREPARATION OF FINELY DIVIDED PARTICLES AND ESPECIALLY TO THE PREPARATION OF HIGH COERCIVITY, FINELY DIVIDED MAGNETIC ALLOY PARTICLES BY REDUCTION OF SALTS OF COBALT, AND MIXTURES OF SALTS OF COBALT AND IRON, MIXTURES OF SALTS OF COBALT AND NICKEL, IN A BATH CONTAINING HYPOPHOSPHITE AND AMINE BORANE ANION REDUCING AGENTS. SODIUM HYPOPHOSPHITE AND DIMETHYL AMINE BORANE OR AN SOLUBLE SALTS WHICH PROVIDE HYPOPHOSPHITE AND AMINE BORANE ANIONS IN SOLUTION ARE REACTED WITH SOLUBLE METAL SALTS OF COBALT ALINE, OR COBALT WITH ITON, OR NICKEL DISSOLVED IN THE BATH. PRECIPITATION OF FINELY DIVIDED METAL-PHOSPHORUS-BORON ALLOY PARTICLES IS BROUGHT ABOUT BY THE REDUCTION OF METAL CATIONS BY THE HYPOPHOSPHITE AND AMINE BORANE ANION REDUCING AGENTS. AFTER SEPARATING AND DRYING, THE PRECIPITATE IS FOUND TO CONSIST OF NON-PYROPHORIC MAGNETIC ALLOY PARTICLES, INCLUDING ABOUT 0.1-5% PHOSPHORUS AND ABOUT 0.1-1.5% BORON, WHICH ARE GENERALLY SPHERICAL IN SHAPE AND WHICH VARY IN SIZE FROM ABOUT 0.01 MICRON TO 3.0 MICRONS IN DIAMETER.
Inventors
- 👤 C Parker
- 👤 R Polleys
- 👤 J Vranka
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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